Immersion probe using ultraviolet and infrared radiation for multi-phase flow analysis
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01J-005/00
E21B-049/08
G01N-021/33
G01N-021/85
G01N-021/3504
G01V-003/30
G01V-008/22
G01N-021/359
G01N-021/05
G01N-021/3577
G01J-003/28
출원번호
US-0516688
(2010-12-17)
등록번호
US-9234420
(2016-01-12)
국제출원번호
PCT/IB2010/003293
(2010-12-17)
§371/§102 date
20121001
(20121001)
국제공개번호
WO2011/073789
(2011-06-23)
발명자
/ 주소
Xie, Cheng-Gang
출원인 / 주소
Schlumberger Technology Corporation
인용정보
피인용 횟수 :
2인용 특허 :
12
초록▼
A system and method for determining characteristics of a multiphase flow in a well/pipe are disclosed. The disclosed system and method use an optical immersion probe including a flow gap across which two or more types of radiation are transmitted in order to measure absorptions of two or more substa
A system and method for determining characteristics of a multiphase flow in a well/pipe are disclosed. The disclosed system and method use an optical immersion probe including a flow gap across which two or more types of radiation are transmitted in order to measure absorptions of two or more substances within the multiphase flow. Primarily, broadband ultraviolet (UV) and/or near infrared radiations (NIR) are utilized with the probe to gather absorption data at and/or around at least one of the water peaks and at and/or around one or more oil or oil-condensate peaks. This data may be utilized to calculate the water-cut of the multiphase flow over a wider range of gas volume fractions. Additionally, pressure ports having pressure sensors being located on the optical immersion probe for determining the impact pressures and flow rates of different phases of the multiphase flow may also be used.
대표청구항▼
1. An optical immersion probe for analyzing a multiphase flow in a pipe, the optical probe comprising: a housing;one or more first optical conduits, adapted to carry ultraviolet radiation and/or infrared radiation from one or more radiation sources at a first end to a second end;a flow gap across wh
1. An optical immersion probe for analyzing a multiphase flow in a pipe, the optical probe comprising: a housing;one or more first optical conduits, adapted to carry ultraviolet radiation and/or infrared radiation from one or more radiation sources at a first end to a second end;a flow gap across which the ultraviolet radiation and/or infrared radiation is transmitted, wherein the flow gap begins at the second end of the one or more first optical conduits and is configured to operatively engage the multiphase flow in the pipe;one or more second optical conduits adapted to receive at least a portion of the ultraviolet radiation and/or infrared radiation, and transmit at least a portion of the received ultraviolet radiation and/or infrared radiation to one or more spectrometers for spectral analysis; andone or more pressure sensors for measuring impact pressure of at least one of the phases in the multiphase flow, wherein: the ultraviolet radiation and/or infrared radiation is attenuated through absorption and/or scattering by the multiphase flow in the flow gap;the multiphase flow is analyzed through the ultraviolet radiation and/or infrared radiation attenuation determined by the spectrometers; andthe probe includes at least two pressure sensors divided by a distance equal to the pipe radius. 2. The optical immersion probe for analyzing a multiphase flow in a pipe, as set out in claim 1, further comprising: one or more pressure lines for use with measuring a density of one or more phases of the multiphase flow. 3. The optical immersion probe for analyzing the multiphase flow in the pipe as recited in claim 2, further comprising: one or more ports for exposing the one or more pressure sensors through the one or more pressure lines to the multiphase flow. 4. The optical immersion probe for analyzing the multiphase flow in the pipe as recited in claim 2, further comprising: a temperature sensor for determining the flow thermodynamic conditions of the multiphase flow. 5. A method for analyzing a multiphase flow in a pipe with an optical immersion probe as recited in claim 1, wherein the multiphase flow includes at least a gas phase and a liquid phase, the liquid phase comprising one or more of water and oil condensate, the method comprising: swirling the multiphase flow to separate the gas and liquid phases of the flow, wherein the swirling comprises applying a centrifugal force;carrying ultraviolet and/or infrared radiation from one or more light sources in one or more first optical conduits;transmitting the ultraviolet and/or infrared radiation from the one or more first optical conduits across a flow gap, wherein the flow gap begins at the second end of the one or more first optical conduits and is configured to operatively engage the multiphase flow;reflecting the ultraviolet and/or infrared radiation on a reflective element, wherein the reflective element is located a distance across the flow gap from the one or more first optical conduits;receiving at least a portion of the reflected ultraviolet and/or infrared radiation in a second optical conduit;transmitting at least a portion of the received ultraviolet and/or infrared radiation to one or more optical spectrometers for spectral analysis; andanalyzing the multiphase flow in a computing device to determine characteristics of the multiphase flow, wherein: the ultraviolet radiation and/or infrared radiation is attenuated through absorption and/or scattering when in contact with the multiphase flow, andthe multiphase flow is analyzed through the ultraviolet and/or infrared attenuation determined by the spectrometers. 6. The method for analyzing the multiphase flow in the pipe with the optical immersion probe as recited in claim 5, wherein the one or more spectrometers includes an infrared spectrometer operating at the 900-2550 nanometer range. 7. The method for analyzing the multiphase flow in the pipe with the optical immersion probe as recited in claim 5, wherein the one or more spectrometers includes an ultraviolet spectrometer operating at the 200-800 nanometer range. 8. The method for analyzing the multiphase flow in the pipe with the optical immersion probe as recited in claim 5, wherein the one or more radiation sources are located external to and separate from the optical immersion probe. 9. The method for analyzing the multiphase flow in the pipe with the optical immersion probe as recited in claim 5, wherein the one or more radiation sources include a first radiation source capable of emitting a continuous light spectrum in the ultraviolet to visible range. 10. The method for analyzing the multiphase flow in the pipe with the optical immersion probe as recited in claim 5, wherein the one or more radiation sources include a second radiation source capable of emitting a continuous light spectrum in the visible to near infrared range. 11. A method for analyzing a multiphase flow in a pipe with an optical immersion probe as recited in claim 1, the method comprising: applying centrifugal force to the multiphase flow, wherein the centrifugal force effectively separates one or more phases of the flow;carrying ultraviolet and/or infrared radiation from one or more light sources in one or more first optical conduits;transmitting the ultraviolet and/or infrared radiation from the one or more first optical conduits across a flow gap, which is configured to operatively engage at least one phase of the multiphase flow;reflecting the ultraviolet and/or infrared radiation on a reflective element, wherein the reflective element is located a distance across the flow gap from the one or more first optical conduits;receiving at least a portion of the reflected ultraviolet and/or infrared radiation in a second optical conduit; andtransmitting at least a portion of the received ultraviolet and/or infrared radiation to one or more optical spectrometers for spectral analysis. 12. The method for analyzing the multiphase flow in the pipe with the optical immersion probe as recited in claim 11, further comprising: exposing one or more pressure sensors to the multiphase flow; andmeasuring the impact pressure of the one or more phases in the multiphase flow with the one or more pressure sensors. 13. The method for analyzing the multiphase flow in the pipe with the optical immersion probe as recited in claim 11, wherein the one or more first optical conduits is an optical fiber bundle for transmitting radiation. 14. The method for analyzing the multiphase flow in the pipe with the optical immersion probe as recited in claim 11, wherein the one or more second optical conduits is an optical fiber bundle for receiving radiation. 15. The method for analyzing the multiphase flow in the pipe with the optical immersion probe as recited in claim 11, wherein the one or more light sources include a first light source capable of emitting a continuous light spectrum in the broadband ultraviolet to visible range. 16. The method for analyzing the multiphase flow in the pipe with the optical immersion probe as recited in claim 11, wherein the one or more light sources include a second light source capable of emitting a continuous light spectrum in the broadband visible to infrared range. 17. The optical immersion probe for analyzing the multiphase flow in the pipe as recited in claim 1, further comprising a reflective element for reflecting the ultraviolet radiation and/or the infrared radiation across the multiphase flow from the one or more first optical conduits to the one or more second optical conduits. 18. The optical immersion probe for analyzing the multiphase flow in the pipe as recited in claim 1, further comprising: an optical window through which to send and receive the ultraviolet radiation and/or infrared radiation. 19. The optical immersion probe for analyzing the multiphase flow in the pipe as recited in claim 1, further comprising: an optical window through which to send and receive the ultraviolet radiation and/or infrared radiation, wherein the optical window is collimated. 20. The optical immersion probe for analyzing the multiphase flow in the pipe as recited in claim 1, further comprising: a temperature sensor for determining the flow thermodynamic conditions of the multiphase flow.
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